On the Substitutional Solid-Solution Strengthening in Iron Alloys
1Fe-Mo,
Materials Literature
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Some investigations concerning the structure of ultraphosphates
Controlled hydrolytic degradation of ultraphosphate glasses at their branching sites has indicated that these compounds, with a ratio of univalent-cation to phosphorus between 0·7–1·0, consist of random arrangements of trimetaphosphate rings, polyphosphate chains, and branched chains. No ring structures larger than tr…
Evidence for the Coulomb Interaction of Be Valence Electrons by Compton Scattering Cross‐Section Measurements
Abstract The effect of Coulomb interaction on the Compton scattering cross‐section (CSCS) of a free electron gas has been calculated theoretically by Ohmura and Matsudaira within the framework of the random phase approximation (RPA). These calculations have shown that plasmon emission during the scattering process dim…
Precipitation in Beryllium-Iron Alloys
Hardness measurements and microscopic observations by both optical and transmission electron microscopy were carried out mainly on a beryllium-3wt% iron alloy.The alloy was solution-treated at 1150°C, followed by oil-quenching, and aged at 400° to 700°C for a various time. In the quenched specimens, helices and loops…
Electromotive Force Investigation of the Bismuth-Tellurium System
The bismuth‐tellurium alloy system was investigated by electromotive force measurements, coulometric titrations, x‐ray diffraction, and differential thermal analyses. The thermodynamic properties of the system have been obtained from the electromotive force measurements. The partial molar free energy, enthalpy, and en…
The Influence of Microstructure on the Fracture Topography of Titanium Alloys
A survey is presented of the fracture topography observed in titanium and titanium alloys. Ductile fracture by microvoid nucleation, growth, and coalescence is of widespread occurrence in these alloys. It is usually possible to qualitatively relate the dimple size to the macroscopic ductility of the alloy. Titanium al…
EFFECTIVE DIFFUSIVITY OF MULTI-COMPONENT GASEOUS REACTION SYSTEM
It was illustratively shown that the use of a definition of the effective diffusivity for a multi -component gaseous reaction system easily gives a sufficiently accurate approximate solution for diffusion through a stagnant gas film. In order to apply the same idea for approximate estimation of the effectiveness facto…
The annealing of graphite irradiated with electrons at 80°K
After fast electron irradiation at 80°K graphite exhibits, in its electrical resistivitiy during isochronal annealing, a reverse stage followed by normal stages. These constitute the Austerman and Hove peak. The reverse stage has previously been attributed to the separation of close Frenkel pairs of defects. In the pr…
Structural Evaluation of Long Boron Composite Columns
Boron filament-epoxy composite tubes were evaluated for use as long column members in a spacecraft. Struts, 8 ft long and 3.2 in. in diameter, were designed, fabricated, and tested. After evaluation of test results, three-ply and four-ply laminates were selected to satisfy design load requirements of 5000 and 7000 lb.…
The photoreactions of 2,6-diphenyl-p-benzoquinone in solution. Photodimerisation and photocyclisation
Irradiation of 2,6-diphenyl-p-benzoquinone in benzene gives a dimer whose precise structure is unknown, while irradiation in acetonitrile gives 2-hydroxy-4-phenyldibenzofuran.
Ětude de la décomposition spinoïdale au microscope électronique dans les alliages CuNiFe
Abstract L'étude du contraste a été effectuée en prenant comme modèle le mécanisme de décomposition spinoïdale prévu par Cahn [1 à 3] pour un alliage binaire cubique, dont l'énergie élastique est minimum suivant une direction β parallèle à <100>. Les contrastes effectivement observés au microscope électronique s…
Pyrolytic Reactions of Carbohydrates. Part VII. Simultaneous DTA‐TGA Study of the Thermal Decomposition of Cellulose In Vacuo
Abstract The decomposition of cellulose, in the absence and presence of additives, has been studied in a combined DTA‐TGA (differential thermal analysis — thermogravimetric analysis) system, in which both determinations were carried out simultaneously and on the same sample. The overall process was found to be endothe…
Stored energy and electrical resistivity of frenkel defects in copper
Simultaneous measurements of the recovery of stored energy and electrical resistivity were performed in a differential heat flux calorimeter after neutron irradiation at 4.6 °K (linear rising of temperature from 6 °K to 250 °K, with variable velocity between 0.3°K/min - 2°K/min). At each main recovery stage the heatin…
The crystal structure of silver decamolybdate, Ag6Mo10O33
Silver decamolybdate, Ag6MO10O33, has a layer structure where infinite sheets of edge and cornershared MoO6 octahedra are held together by silver ions.
PYROMORPHITE-MIMETITE MINERALS FROM THE OTARU-MATSUKURA BARITE MINE IN HOKKAIDO, JAPAN
Beautiful green pyromorphite and yellow mimetite crystals were found from the Otaru-Matsukura barite mine, Hokkaido. The physical and chemical properties of these minerals were investigated. Pyromorphite, mimetite and intermediate solid solutions were synthetized, and their physical properties were compared with those…
Phosphors Based on Rare Earth Phosphates
Because does not absorb at wavelengths longer than about 2000Aå, the rare earth phosphates, , where Ln is any rare earth (other than La, Pm, or Lu), represent an ideal system for the study of rare earth absorption. Reflectance spectra of all compounds are presented for wavelengths between 2000 and 8000Aå. Only and pro…
Effect of Porosity on the Thermal Conductivity of ThO2
The eflect of porosity on the thermal conductivity of sintered ThO2 of densities ranging from 90 to 95% of theoretical density was investigated at 20°C. The thermal conductivity was determined by means of laser pulse. Discrepancies were observed between the experimental results and the relation derived by Loeb. This d…
Piezomagnetization of Single-Domain Grains: A Graphical Approach
The remanent magnetic properties of single-domain grains under uniaxial compression are easily interpreted by a graphical method based on the Néel thermal fluctuation theory, provided the stress σ and the magnetic field H are parallel. The change in remanence resulting from a change in magnetic field, stress, or tempe…
Crystal Anisotropy and Temperature Dependence of Young’s Modulus in Single Crystal of Nickel
Cylindrical single crystals of nickel were prepared and their thermal expansion and Young’s modulus were measured over the temperature range of 0°∼500°C by a dilatometer and by means of an electrostatic type vibrator-controlled oscillator system, respectively. Then, from the measured values, the elastic parameters Sij…
Ligand field splittings in non-cubic complexes. Part I. Tetragonal copper( II )—nitrogen systems
The relative energies of the d-orbitals in tetragonal copper(II) complexes with ammonia and ethylenediamine are discussed in terms of a simple empirical theory. The d-orbital splitting is considered to arise from both σ-antibonding and electrostatic effects. The former is calculated from angular overlap considerations…